ABSOLUTELY do I reward kiddo for helping out... and have since he was a baby (even at 1yo he was helping me make dinner, and cleaning up messes he made, and throwing laundry into correct colored piles).
Smiles, hugs, high fives, praise, random treats, gratitude = "thanks so much for helping me with / doing x, y, z", public recognition = "Kiddos GREAT at doing x,y,z", tons and tons of rewards.
We DO have a chore chart that's tied to his allowance, but that's more of an adhd thing (learning balance, patterns, discipline) and it includes not only specifically listed chores, but also play time has to get checked off, as well as school, and the oh-so-vague "help with projects". So in addition to all of his chores he needs to check off "fun" things as well as common courtesy things.
At 4... my son's favorite chores were
- Windexing everything that was glass
- Spray cleaning the cupboards (I'd do the counters, he'd do the cupboards)
- Doing the laundry (as in lobbing the clothes in, measuring out the soap, starting the machine, and banging the lid shut... I'd do the rest)
- "Washing" the dishes (he did a terrible job, but he loved it, so I let him)
- Sweeping/ Vacuuming/ washing the floors